Convert Lambda from C# to VB.NET

Question

How would I translate this C# lambda expression into VB.NET ?

query.ExecuteAsync(op => op.Results.ForEach(Employees.Add));

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using IdeaBlade.Core;
using IdeaBlade.EntityModel;

namespace SimpleSteps
{
    public class MainPageViewModel
    {
        public MainPageViewModel()
        {
            Employees = new ObservableCollection();
            var mgr = new NorthwindIBEntities();
            var query = mgr.Employees;
            query.ExecuteAsync(op => op.Results.ForEach(Employees.Add));
        }

    public ObservableCollection<Employee> Employees { get; private set; }
}


}

        // Summary:
    //     Execute the query asynchronously.  IdeaBlade.EntityModel.EntityManager.ExecuteQueryAsync()
    //
    // Parameters:
    //   query:
    //     This query
    //
    // Type parameters:
    //   T:
    //     Entity type returned
    public static EntityQueryOperation<T> ExecuteAsync<T>(this IEntityQuery<T> query);
    //
    // Summary:
    //     Execute the query asynchronously.  IdeaBlade.EntityModel.EntityManager.ExecuteQueryAsync()
    //
    // Parameters:
    //   query:
    //     This query
    public static EntityQueryOperation ExecuteAsync(this IEntityQuery query);
    //
    // Summary:
    //     Execute the query asynchronously.  IdeaBlade.EntityModel.EntityManager.ExecuteQueryAsync()
    //
    // Parameters:
    //   query:
    //     This query
    //
    //   userCallback:
    //     Callback invoked when the query completes
    //
    //   userState:
    //     Token to identify the query upon completion
    //
    // Type parameters:
    //   T:
    //     Entity type returned
    //
    // Remarks:
    //     Provide a userCallback if you want to be notified when the operation completes.
    //      The query results will be returned in the IdeaBlade.EntityModel.EntityQueriedEventArgs
    //     passed to the userCallback.  Use the userState to uniquely identify this
    //     call.
    public static EntityQueryOperation<T> ExecuteAsync<T>(this IEntityQuery<T> query, Action<EntityQueryOperation<T>> userCallback, object userState = null);
    //
    // Summary:
    //     Execute the query asynchronously.  IdeaBlade.EntityModel.EntityManager.ExecuteQueryAsync()
    //
    // Parameters:
    //   query:
    //     This query
    //
    //   userCallback:
    //     Callback invoked when the query completes
    //
    //   userState:
    //     Token to identify the query upon completion
    //
    // Remarks:
    //     Provide a userCallback if you want to be notified when the operation completes.
    //      The query results will be returned in the IdeaBlade.EntityModel.EntityQueriedEventArgs
    //     passed to the userCallback.  Use the userState to uniquely identify this
    //     call.`

already try it,gives error Error 1 Overload resolution failed because no accessible 'ExecuteAsync' can be called with these arguments — Iosu
– Iosu, Commented Apr 20, 2010 at 19:01
Again, what is the definition of ExecuteAsync? The IdeaBlade site doesn't provide any documentation. We need to know the actual signature of the method (what parameters it expects, all of the overloads, etc.) — Adam Robinson
– Adam Robinson, Commented Apr 20, 2010 at 19:39

Adam Robinson · Accepted Answer · 2010-04-20 18:38:43Z

2

Starting with 2010, VB10 supports non-functional lambdas.

query.ExecuteAsync(Sub(op) op.Results.ForEach(Employees.Add))

answered Apr 20, 2010 at 18:38

Adam Robinson

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4 Comments

Iosu Over a year ago

also the same error already try it,gives error Error 1 Overload resolution failed because no accessible 'ExecuteAsync' can be called with these arguments

Adam Robinson Over a year ago

Can you provide the method definition for ExecuteAsync?

Iosu Over a year ago

.... using IdeaBlade.Core; using IdeaBlade.EntityModel; namespace SimpleSteps { public class MainPageViewModel { public MainPageViewModel() { Employees = new ObservableCollection<Employee>(); var mgr = new NorthwindIBEntities(); var query = mgr.Employees; query.ExecuteAsync(op => op.Results.ForEach(Employees.Add)); } public ObservableCollection<Employee> Employees { get; private set; } } }

Adam Robinson Over a year ago

Err, please post it as an edit to your question, not as a comment.

BlackICE · Accepted Answer · 2010-04-20 18:37:02Z

1

query.ExecuteAsync(Function(op) op.Results.ForEach(Employees.Add))

also you can do this here: http://www.developerfusion.com/tools/convert/csharp-to-vb/

answered Apr 20, 2010 at 18:37

BlackICE

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Comments

Iosu · Accepted Answer · 2010-04-20 23:49:18Z

-1

I found the solution..

query.ExecuteAsync.Results.ForEach(Sub(o) Employees.Add(o))

Hope this helps to others

answered Apr 20, 2010 at 23:49

Iosu

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